Convert PNG Images to PDF Documents in a Snap

Convert any PNG image to PDF without losing quality. Try it for free.
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How it works

Upload PNG Files

Simply upload your PNG by dragging and dropping it into the box above to convert it to a PDF document. To start over, you may delete the images or rearrange them in a different order.

Convert PNG to PDF

For this, you don’t have to buy and install specific software. After you’ve uploaded an image, just click the Convert button.

Absolutely Free

There is one more advantage to using our converter. AltoPNGtoPDF is a free service. Unlike other cloud services, our app allows you to use it absolutely for free.

Encrypted files transfer

Using AltoPNGtoPDF, everything that you process is highly protected. We offer an encrypted connection that allows you to securely transform your data.

Compatibility with major OS

You may use our service on any internet-connected device. Run the app any time on operating systems such as MacOS, Linux and Windows.

Converting files in the cloud

This service does not consume storage space as all its conversion tools exist in cloud storage. This allows you to use the app whenever you need.


File extension .png
Internet media type image/png
Description: The PNG (Portable Network Graphic) is a graphics file format used for adding transparencies to an image. PNG is often considered as a replacement for both JPEG and GIF formats and combines the features of both. PNGs enable you to have opaque and transparent components in one picture. Since they offer a better color flexibility, they're considered a great option for web designers.
Technical Details: A PNG file offers a higher quality level than a GIF file. PNG files support both the 24-bit RGB and 32-bit RGBA color profiles but do not support the CMYK profile, simply because they weren’t designed for printing. The reason you would choose this format over GIF is that PNGs don't have copyright limitations and lets you work with a wider range of colors.
Developed by PNG Development Group
Initial Release: 1 October 1996
Useful links:


File extension .pdf
Internet media type application/pdf
Description: PDF stands for Portable Document Format. It was designed to simplify the procedure of sharing files between users who view them on different devices and operating systems. PDF documents can contain both text and graphics objects. The format is widely popular because of its versatility and relatively small size combined with high resolution quality.
Technical Details: A standard PDF is a 7-bit ASCII file with a fixed structure based on the PostScript language. Along with flat text and graphics.A PDF document may include various types of content such as form fields, hyperlinks, bookmarks, buttons, layers, annotations, etc. There is also a possibility to include video content and three dimensional objects.
Developed by ISO
Initial Release: 15 June 1993
Useful links:


Customer Questions and Answers

I have an ebook saved as multiple PNG files, one per each page. How do I combine them into one document and save it in PDF format? Looking for an easy to use freeware tool. Thanks!
Here’s the procedure. First, upload your png to You are able to add more and more png’s until the whole book is there. Then just press the Convert Now button and you’re there. With this tool, you can compress any number of images into a single ZIP file.
By James on June 01, 2018
What is the quickest way to change a simple PNG image to a PDF document without installing any app or plugin? Thanks!
Drag and drop you file to and press Convert Now. It's the most simple yet powerful solution you can find on the web.
By Curt on April 11, 2018
Hi! I'm using a Windows PC and it seems like there's no way I can convert PNG files to PDFs for free using any of the built-in apps. Is there a cross-platform solution maybe? All suggestions are highly appreciated!
Forget about these complications! In fact, it doesn't matter what operating system you use. Go to, upload your PNG files and change them to PDFs in a few clicks. All you need is a stable internet connection!
By Michael on March 21, 2018
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Our service faciliates the work of over two million people converting PNG images online every year.


How to Convert PNG to PDF?

These days, there are a variety of document formats that have their own pros and cons. This is good because people can select the most suitable type of format that will meet their specific requirements to the fullest extent. When it comes to storing images and photos, most individuals tend to choose JPG and PNG. However, in some cases you may need to use another format, such as PDF.

As paperless workflow becomes more and more popular, people are searching for the best document management solutions with the best set of features. In our modern world where it is easy to get overwhelmed by choice, it can be rather complicated to select an appropriate document management solution. We suggest you take advantage of online PDF managers that allow you to manipulate your files anytime, anywhere and from any device.

How to Convert PNG Images to PDF Documents(Online & Free)?

As technologies are constantly developing, there are now various converters that give you the ability to manipulate your files in seconds. To save your time and efforts, we offer you to take advantage of online converting tools. They provide users with a number of advantages such as:

  • free and easy usage;
  • step-by-step instruction;
  • cross-platform capability;
  • optimization for mobile devices;
  • ability to download without any additional software;
  • security of your digital papers.

By storing and saving your documents in image format such as PNG, you gain the following benefits:

  1. working with images in PNG is easier than with PDFs;
  2. they ensure the safety of information, because no important data can be extracted;
  3. the quality of images and photos in PNG is better than that of PDFs;
  4. you can effortlessly compress several images into a single ZIP.

Despite the above-mentioned advantages, you should be aware that photos will consume much space on your hard drive. To eliminate this issue, all you have to do is use one of the advanced online converters. The process of changing your PNG document to PDF format is quite simple and only requires a few effortless steps:

  • open a specific digital converting service;
  • upload a PNG you want to change from your computer or a smartphone to a drag and drop box;
  • after that select the “Start now” button to begin the conversion;
  • once a file is transformed, download it to your device or save it to a cloud storage;
  • continue editing your newly created PDF using various tools.

How do I save an image as a PDF?

The digital PNG to PDF converters are very user-friendly and provide users with step-by-step instructions:

  1. The process of changing a format takes just a few seconds.
  2. In case you have uploaded a wrong image, you have to click the “Start over again” button to restart the procedure.
  3. Moreover, you have the option to convert multiple PNGs to PDFs at a time and even delete the images or rearrange them in a different order.

To save a transformed PDF file just download it to your computer, smartphone or any mobile device. Saving it to the cloud is also an option.

The key point of converting PNG to PDF online is that you can be sure your files will stay secure, because:

  • the online solutions delete them from a server after they`ve been transformed;
  • they offer an encrypted connection that allows you to securely transform your data.